Reactivity series

Question 1

Metal + water?

Answer 1

Metal hydroxide + hydrogen

Question 2

Metal + steam?

Answer 2

Metal hydroxide + hydrogen

Question 3

Reaction of K and steam

Answer 3

React explosively, should not be carried out in the school lab

Question 4

Reaction of Na and steam

Answer 4

React explosively, should not be carried out in the school lab

Question 5

Reaction of Ca and steam

Answer 5

React explosively, should not be carried out in the school lab

Question 6

Reaction of Ca and water

Answer 6

React readily

Question 7

Reaction of K and water

Answer 7

React very violently, will explode

Question 8

Reaction of Na and water

Answer 8

React violently, may explode. Na skids of the surface of the water

Question 9

Reaction of mg with water

Answer 9

Reacts very slowly. Takes a few days to produce a test tube of hydrogen

Question 10

Reaction of mg with steam

Answer 10

Hot mg reacts violently. A bright white glow is produced during the reaction

Question 11

Reaction of zinc and water

Answer 11

No reaction

Question 12

Reaction of iron and water

Answer 12

No reaction

Question 13

Reaction of copper and water

Answer 13

No reaction

Question 14

Reaction of silver and water

Answer 14

No reaction

Question 15

Reaction of lead and water

Answer 15

No reaction

Question 16

Reaction of zinc and steam

Answer 16

Hot zinc reacts readily. Yellow when hot and white when cold.

Question 17

Reaction of iron and steam

Answer 17

Red-hot iron reacts slowly with steam. It has to be constantly heated for the reaction to progress.

Question 18

Reaction of lead with steam

Answer 18

No reaction

Question 19

Reaction of copper with steam

Answer 19

No reaction

Question 20

Reaction of silver with steam

Answer 20

No reaction

Question 21

Metal + HCl?

Answer 21

Metal chloride + hydrogen (For metals above hydrogen in the reactivity series)

Question 22

Reaction of K with HCl

Answer 22

React explosively, should not be carried out in school lab

Question 23

Reaction of Na and HCl

Answer 23

React explosively, should not be carried out in the school lab

Question 24

Reaction of Ca and HCl

Answer 24

Reacts violently

Question 25

Reaction of mg and HCl

Answer 25

Reacts rapidly

Question 26

Reaction of zinc and HCl

Answer 26

Reacts moderately fast

Question 27

Reaction of iron and HCl

Answer 27

Reacts slowly

Question 28

Reaction of lead with HCl

Answer 28

No reaction as Lead form insoluble lead (II) chloride that coats the metal

Question 29

Reaction of copper and HCl

Answer 29

No reaction

Question 30

Reaction of silver and HCl

Answer 30

No reaction

Question 31

Aluminium reaction with water

Answer 31

Aluminium reacts with oxygen in the air to form an insoluble layer of aluminium oxide, preventing further reaction

Question 32

Aluminum reaction with steam

Answer 32

Aluminium reacts with oxygen in the air to form an insoluble layer of aluminium oxide, preventing further reaction

Question 33

Metal + Carbon

Answer 33

Metal + CO2 (Only metal oxides below carbon can be reduced by carbon)

Question 34

Metal oxide + hydrogen

Answer 34

Metal + steam (only metal oxides below hydrogen can be reduced by hydrogen)

Question 35

Link between reactivity and temperature needed for reduction?

Answer 35

The higher the metal in the reactivity series, the higher the temperature needed for the reduction of the metal

Question 36

Link between reactivity and tendency to form ions

Answer 36

A more reactive metal has a greater tendency to form positive ions compared to a less reactive metal

Question 37

How do displacement reactions work

Answer 37

The more reactive metal displaces the less reactive metal

Question 38

What type of reaction is a displacement reaction

Answer 38

A redox reaction

Question 39

Reaction between a metal and the oxide of another metal

Answer 39

The more reactive metals reduces the oxide of the less reactive metal

Question 40

Action of heat on metal carbonates

Answer 40

The more reactive a metal is the harder it is to decompose its carbonate by heat

Question 41

K carbonate with heat

Answer 41

Unaffected

Question 42

Na carbonate with heat

Answer 42

Unaffected

Question 43

Metals carbonates below Na with heat

Answer 43

Decomposes into metal oxide and CO2

Question 44

Silver carbonate with heat

Answer 44

Decomposes to form silver oxide and CO2 which further decomposes to form silver

Question 45

Which metals are extracted by electrolysis

Answer 45

K, Na, Ca, Mg (High up, stable, difficult to break down)

Question 46

Which metals are extracted by reduction by carbon

Answer 46

Zn, Fe, Cu, Pb, Ag (Lower, less stable)

Question 47

Conditions for rusting

Answer 47

Water and oxygen

Question 48

Reaction of iron during rusting

Answer 48

Iron is oxidised to form Iron (III) oxide

Question 49

What increases the rate of rusting

Answer 49

Sodium Chloride

Question 50

How to prevent rusting

Answer 50

Barrier methods or sacrificial protection

Question 51

How do barrier methods work

Answer 51

By keeping iron away from oxygen and water (Painting, oiling, greasing, or coating)

Question 52

What is sacrificial protection?

Answer 52

Use of a more reactive metal to protect iron and steel by reacting in stead of it (rust/ corrode)

Question 53

Disadvantages of barrier methods

Answer 53

Rust will form if the layer is scratched or torn

Question 54

Advantages of using a sacrificial metal

Answer 54

Metal does not rust even if layer is scratched

Question 55

Advantages of barrier methods

Answer 55

Gives it a nice shiny finish